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Photochromic polyurethanes for rewritable CGHs in optical testing.

Giorgio Pariani¹, Chiara Bertarelli, Giovanni Dassa

¹Dipartimento di Chimica, Materiali e Ingegneria Chimica G. Natta, piazza Leonardo da Vinci 32, Milano, Italy. giorgio.pariani@brera.inaf.it

|March 4, 2011

Summary

This summary is machine-generated.

New photochromic Computer Generated Holograms (CGHs) offer rewritable and self-developing capabilities for testing complex optics. This advancement promises improved efficiency in optical testing and manufacturing processes.

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Area of Science:

Optics and Photonics
Materials Science
Holography

Background:

Advanced optical components like aspheres and free-form optics require precise testing methods.
Current testing technologies may lack flexibility and efficiency for complex optical surfaces.

Purpose of the Study:

To develop and evaluate photochromic Computer Generated Holograms (CGHs) for testing complex optical elements.
To synthesize a novel material suitable for creating durable and effective photochromic CGHs.

Main Methods:

Synthesis of a thermally irreversible photochromic polyurethane.
Fabrication of thin films from the synthesized material.
Testing of the photochromic CGH using a simple interferometrical setup.

Main Results:

The synthesized polyurethane forms good thin films with significant optical transmission modulation.
Photochromic CGHs demonstrated promising results in interferometrical testing configurations.
The developed CGHs exhibit rewritability and self-developing properties.

Conclusions:

Photochromic CGHs represent a promising new technology for testing complex optics.
The synthesized material is suitable for creating effective photochromic CGHs.
Rewritability and self-developing features offer advantages over conventional holographic testing methods.